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首页> 外文期刊>Electronics and Communications in Japan >Disaggregation and Surface Modification of Nano-Size Diamond by Ultrasound Exposure: Relationships among Acoustic Intensity, Disaggregation, and Surface Modification
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Disaggregation and Surface Modification of Nano-Size Diamond by Ultrasound Exposure: Relationships among Acoustic Intensity, Disaggregation, and Surface Modification

机译：超声暴露对纳米金刚石的分解和表面改性：声强度，分解和表面改性之间的关系

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摘要

We used ultrasound exposure to perform disaggregation and surface modification of aggregated nano-diamond particles. We formed a standing-wave sound field using a Langevin transducer to drive a stainless-steel vibrating disk installed at the bottom of a water tank, and generated efficient acoustic cavitation. With 20 minutes of ultrasonic exposure, we were able to reduce aggregated nano-diamond particles with average particle diameters of 5 μm to average particle diameters of 100 nm or less. We also confirmed that we had improved the zeta potential, an index of surface modification, by a factor of more than two. Furthermore, we used a hydrophone to measure the sound field inside the water tank, and calculated the average acoustic intensity at 800 W/m~2 or more to demonstrate that the nano-diamond surfaces had been modified. We confirmed that the zeta potential and average particle diameter of the nano-dia-monds could be maintained for at least 150 days after ultrasound exposure.
机译：我们使用超声暴露对聚集的纳米金刚石颗粒进行分解和表面改性。我们使用Langevin传感器形成驻波声场，以驱动安装在水箱底部的不锈钢振动盘，并产生有效的声空化。经过20分钟的超声波暴露，我们能够将平均粒径为5μm的聚集纳米金刚石颗粒还原为100 nm或更小的平均粒径。我们还证实，我们将zeta电位（表面改性指数）提高了两倍以上。此外，我们使用水听器来测量水箱内的声场，并计算出800 W / m〜2或更高的平均声强，以证明纳米金刚石表面已被改性。我们证实，在超声暴露后，纳米金刚石的ζ电位和平均粒径可以保持至少150天。

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